Investigation of Anaerobic Digestion Backed by Solar-Wind System for Production of Clean Energies in Rural Areas Yusto Mugisha Yustas1, Valerian C.K. Silayo1, and Siza Donald Tumbo1
Introduction Rural communities in Africa are facing discouraging challenges of sustainable supply of their energy needs as well as the low soil fertility. Improving energy accessibility and source of soil nutrients in rural areas will essentially require strategies which will facilitate the utilisation of the locally available cheap and low value materials and resources e.g. biomass (cowdung), solar and wind. Integrated system consisting of renewable energy resources is suitable for energy generation and a source of soil nutrients (nutrient cycling). This may facilitate improvement of Food Value Chain (FVC) components, mainly being Natural Resources and Production; Processing and Consumption in rural areas especially in Tanzania. Therefore researching on this system is important.
The Study The Study aim to investigate the anaerobic digestion backed by solarwind system for production of clean energies (biogas and renewable electricity) and bioslurry in rural areas of Tanzania (e.g. Chamwino).
The concept
ANAEROBIC DIGESTION
SOLAR + WIND
Feasibility on resources (cow dung) Lab testing of some factors(C/N,TS)
Feasibility on resources &Some factors (Solar radiation, wind speed)
Optimising the system
Optimising the system
To realize the goal of the study a strategy of combining, optimally, solar and wind systems to produce heat for keeping anaerobic digestion system temperature ideally constant, and electricity for households is formulated and implemented.
Installation Testing
The biogas and bio-slurry from the Anaerobic Digestion system will be used only for cooking and supply of soil nutrients to the farm/kitchen gardens respectively.
Ener for powering electrical gadgets Energy (ele (electricity)
Energy for cooking (biogas) as)
Figure 1: Conceptual Framework of the Study
Fig. 1 Overall Conceptual Framework of the Study.
Study Approach
Preliminary Results
• The
study approach will involve primary and secondary data collection from experiments and literature as well as the data mining(modelling) plus use of optimising tools. The prototype of integrated system involving solar-wind-biomass will be produced and tested at the study sites.
FP
•
Average annual availability of wind and solar energy of 6 m/s and 4.7 kWh/m2/day, respectively.
that of 0.23 % per year from 2001 to 2007.
characterise the available renewable energy resources (biomass/cowdung, wind and solar) and rural households energy demand; NR
For semi arid rural areas in Tanzania, Chamwino district inclusive, have:
• Decreasing rate of fuel wood sources of 0.68 % per year since 2007 comparing with
• The procedure to be followed will include the following:
ii.
CONNECTI CONNECTION ECTION AD + SOLAR+WIND & BATTERIES Wiring/piping
Bio-Slurry for soil nutrient improvement
Model based on inputs (weather, feedstock, heat) and output (bioslurry, biogas, electricity) will be obtained. Fig. 1 illustrates an overall conceptual framework of the study.
i.
Designing
Testing the System
P
designing the integrated solar-wind energyOn-Field and anaerobic digestion system; Year 1 Year 2
Expected Results • Report on characterization of renewable resources and energy demand in case study site.
inventorying food value chains / screening of upgrading strategies
iii. developing a model for predicting the efficiency of integrated testing/analysing of upgrading strategies solar-wind energy and anaerobic digestion system, and
iv.
techno-economical appraising of integrated solar-wind energy and anaerobic digestion system
• Designed
integrated system with digester temperature control mechanism
• Model for efficiency of integrated anaerobic digestion-solar-wind system • techno-economic analysis results of the
system in question
Email:
[email protected]
BMBF 1.
Tanzania
Sokoine University of Agriculture, Dept. of Agric. Engineering and Land Planning,
